Table of Contents. 



pao;e 



Descriptionofillustrations ' 



Introductiontotables ö 



Tables 7 



Somevariationsinexternalstructures 28 



Cleavage 28 



Gastrulation 28 



Closure of neural folds 28 



Appearance of optic vesicles 28 



Neuromeres (?) 28 



Somites 2g 



Lateral curvature of body 29 



Externa] gills 29 



Limbs 29 



Pigmentation 29 



Variationsininternalstructures 30 



Notochord 30 



Eye 30 



Ear 30 



Nose 30 



Epiphysis 30 



Paraphysis 30 



Hypophysis 31 



Liver 31 



Pancreas 31 



Spleen • 31 



Thymus 31 



Trachea — lungs 31 



Bibliography 32 



Introduction 32 



A. Alphabetical arrangement of titles according to authors 32 



B. Alphabetical arrangement of authors under topics 48 



Plates. 



